3 Select TAF.
Airport identifier
Aviation flight category
Age of the data and when the report was issued
Time period covered in the report
Wind direction, speed, and gusts
Height of the base of the lowest clouds and visi
bility in statute miles
Weather conditions
4 Press DOWN to view reports for later times.
Body Battery
Your watch analyzes your heart rate variability, stress
level, sleep quality, and activity data to determine your
overall Body Battery level. Like a gas gauge on a car, it
indicates your amount of available reserve energy. The
Body Battery level range is from 0 to 100, where 0 to 25
is low reserve energy, 26 to 50 is medium reserve energy,
51 to 75 is high reserve energy, and 76 to 100 is very high
reserve energy.
You can sync your watch with your Garmin Connect
account to view your most up-to-date Body Battery level,
long-term trends, and additional details (
).
Tips for Improved Body Battery Data
• For more accurate results, wear the watch while
sleeping.
• Good sleep charges your Body Battery.
• Strenuous activity and high stress can cause your Body
Battery to drain more quickly.
• Food intake, as well as stimulants like caffeine, has no
impact on your Body Battery.
Performance Measurements
These performance measurements are estimates that can
help you track and understand your training activities
and race performances. The measurements require
a few activities using wrist-based heart rate or a
compatible chest heart rate monitor. Cycling performance
measurements require a heart rate monitor and a power
meter.
These estimates are provided and supported by Firstbeat
Analytics
™
NOTE: The estimates may seem inaccurate at first. The
watch requires you to complete a few activities to learn
about your performance.
VO2 max.: VO2 max. is the maximum volume of oxygen
(in milliliters) you can consume per minute per kilogram
of body weight at your maximum performance (
).
Predicted race times: Your watch uses the VO2 max.
estimate and your training history to provide a target
race time based on your current state of fitness
(
Viewing Your Predicted Race Times, page 30
).
HRV stress test: The heart rate variability (HRV) stress
test requires a Garmin chest heart rate monitor. The
watch records your heart rate variability while standing
still for 3 minutes. It provides your overall stress level.
The scale is 1 to 100, and a lower score indicates
a lower stress level (
Heart Rate Variability and Stress
).
Performance condition: Your performance condition is a
real-time assessment after 6 to 20 minutes of activity.
It can be added as a data field so you can view your
performance condition during the rest of your activity.
It compares your real-time condition to your average
fitness level (
Performance Condition, page 31
).
Functional threshold power (FTP): The watch uses your
user profile information from the initial setup to
estimate your FTP. For a more accurate rating, you
can conduct a guided test (
).
Lactate threshold: Lactate threshold requires a chest
heart rate monitor. Lactate threshold is the point
where your muscles start to rapidly fatigue. Your watch
measures your lactate threshold level using heart rate
data and pace (
).
Stamina: The watch uses your VO2 max. estimate and
heart rate data to provide real-time stamina estimates.
It can be added as a data screen so you can view
your potential and current stamina during your activity
(
Viewing Your Real-Time Stamina, page 32
).
About VO2 Max. Estimates
VO2 max. is the maximum volume of oxygen (in milliliters)
you can consume per minute per kilogram of body
weight at your maximum performance. In simple terms,
VO2 max. is an indication of athletic performance and
should increase as your level of fitness improves. The
D2 Mach 1 device requires wrist-based heart rate or
a compatible chest heart rate monitor to display your
VO2 max. estimate. The device has separate VO2 max.
estimates for running and cycling. You must run either
outside with GPS or ride with a compatible power meter at
a moderate level of intensity for several minutes to get an
accurate VO2 max. estimate.
On the device, your VO2 max. estimate appears as a
number, description, and position on the color gauge. On
Appearance
29
Summary of Contents for D2 MACH1
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